Order of PTFs at release upgrade

[as400@xxxxxxxxxxxxxxxx]

I'm still working on upgrading from 5.1 to 5.3.

I'm a little bit unclear on the PTF install process immediately after 
the upgrade (before the IPL). I've received the latest 5.3 CUME along 
with Hipers and DB Group. I'd like to install from image catalog.

Should I install the CUME then IPL, then install HIPERS and DB Group or 
install all three at the same time before the IPL?

There is a new option in GO PTF 8, 'Prompt for Media' that I'm not sure 
how to use.

Assuming CUME and groups are installed at the same time, do I load them 
all into the same image catalog or should I have a separate catalog for 
CUME and for HIPER/DB Group?

If the catalog is the same, which order should it be loaded in? CUME 
first or groups first?

Still assuming CUME and groups go on at the same time, depending on 
whether they are in different catalogs or not, how do I correctly use 
the 'Prompt for media' option?

If somebody could give me a 'strategy' to follow on how and in what 
order to apply CUME, HIPERS and DB Group as part of the release upgrade 
I'd be most grateful.

Thanks in advance
Moe